Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS-P-821 GRFFF found under Pumice Technical by General Services Administration Inc. The National Stock Number assigned to this part is 5350001619033, and the Federal Supply Class is 5350 Abrasive Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SS-P-821 GRFFF.